Here
https://www.google.com/search?q=pegasus+book&safe=active&client=ms-android-boost-us-revc&prmd=inv&sxsrf=ALeKk01e-plaExD3XGPeSjPIXy-hoAG5Kw:1623207597697&source=lnms&tbm=isch&sa=X&ved=2ahUKEwjx_YbCx4nxAhUjCjQIHZtXCtAQ_AUoAXoECAMQAQ
Books are by O'Haren